It runs fine on the PC, they just didn't port everything. In some scenes/during some bosses you have to press a combination of keys which appear on the screen, you get to see nice keys from a GC, same with the built in help file, all for the GC. Besides that there is no mouse aim by default, I didn't know there was this mouseaim utility.

Anyway, once you get used to the controls it actually does play fine and is rather addictive.

I have the PS2 version, great game. I'm dissapointed from what I've been reading about the PC port...I figured they'd had enough time to actually do something decent and maybe impressive with the game, tune playability, etc..ahh well, I'll just load up my PS2 version if I wanna play it.